adolforosado:
I'd like to hear how it could be done.Not why it can't or won't
Please if you're just going to troll the post with negativity just abstain.
Does anybody know if this is in the realm of possibility for these little microprocessors, a couple of sound sensors and code.
OK, it can't be done.
This is because you will not get a signal clean enough signal from a microphone with all the ambient noise. Also the process does not have much memory and little in the way of processing power, it only has about the equivalent of a 1985 home computer.
OK so you don't want to believe me and want to try yourself.
So sample the sound from the microphone into a buffer. Then run two versions of the Goertzel algorithm through the data in this buffer, one for each frequency you want to detect.